Re: [Qemu-devel] [PATCH v5 00/21] vhost-user: add migration support

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Sep 24, 2015 at 06:22:00PM +0200, marcandre.lureau@redhat.com wrote:
> From: Marc-André Lureau <marcandre.lureau@redhat.com>
> 
> Hi,
> 
> The following series implement shareable log for vhost-user to support
> memory tracking during live migration. On qemu-side, the solution is
> fairly straightfoward since vhost already supports the dirty log, only
> vhost-user couldn't access the log memory until then.
> 
> The series includes "protocol feature negotiation" series proposed
> earlier by Michael S. Tsirkinm and "vhost user: Add live migration"
> series from Thibaut Collet .

So I dropped everything except the 1st patch from my tree
since there were too many failures.

> v4->v5:
> - rebase on top of last Michael S. Tsirkin PULL request
> - block live migration if !PROTOCOL_F_LOG_SHMFD
> - wait for a reply after SET_LOG_BASE
> - split vhost_set_log_base from the rest of vhost_call refactoring
> - use a seperate global vhost_log_shm
> 
> v3->v4:
> - add the proto negotiation & the migration series
> - replace the varargs vhost_call() approach for callbacks
> - only share-allocate when the backend needs it
> 
> v2->v3:
> - changed some patch summary
> - added migration tests
> - added a patch to replace error message with a trace
> 
> The development branch I used is:
> https://github.com/elmarco/qemu branch "vhost-user"
> 
> Marc-André Lureau (18):
>   configure: probe for memfd
>   util: add linux-only memfd fallback
>   util: add memfd helpers
>   vhost: alloc shareable log
>   vhost: document log resizing
>   vhost: add vhost_set_log_base op
>   vhost-user: send log shm fd along with log_base
>   vhost-user: add a migration blocker
>   vhost: use a function for each call
>   vhost: only use shared log if in use by backend
>   vhost-user: document migration log
>   net: add trace_vhost_user_event
>   vhost-user-test: move wait_for_fds() out
>   vhost-user-test: remove useless static check
>   vhost-user-test: wrap server in TestServer struct
>   vhost-user-test: learn to tweak various qemu arguments
>   vhost-user-test: add live-migration test
>   vhost-user-test: check ownership during migration
> 
> Michael S. Tsirkin (1):
>   vhost-user: unit test for new messages
> 
> Thibaut Collet (2):
>   vhost user: add support of live migration
>   vhost user: add rarp sending after live migration for legacy guest
> 
>  configure                         |  19 ++
>  docs/specs/vhost-user.txt         |  63 ++++-
>  hw/net/vhost_net.c                |  35 ++-
>  hw/scsi/vhost-scsi.c              |   7 +-
>  hw/virtio/vhost-backend.c         | 121 +++++++-
>  hw/virtio/vhost-user.c            | 571 ++++++++++++++++++++++++--------------
>  hw/virtio/vhost.c                 | 101 ++++---
>  include/hw/virtio/vhost-backend.h |  77 ++++-
>  include/hw/virtio/vhost.h         |  15 +-
>  include/net/vhost_net.h           |   1 +
>  include/qemu/memfd.h              |  24 ++
>  net/vhost-user.c                  |  34 ++-
>  tests/vhost-user-test.c           | 390 ++++++++++++++++++++++----
>  trace-events                      |   3 +
>  util/Makefile.objs                |   2 +-
>  util/memfd.c                      | 126 +++++++++
>  16 files changed, 1260 insertions(+), 329 deletions(-)
>  create mode 100644 include/qemu/memfd.h
>  create mode 100644 util/memfd.c
> 
> -- 
> 2.4.3